development

The worm causes a debilitating intestinal disease called schistosomiasis. And the parasite is spreading rapidly because of an economic boom along the shores of East Africa's Lake Malawi.

Many families in rural Tajikistan spend hours each day collecting water from communal spigots or nearby rivers, where the water often isn't safe. When one village gets a new water system — and a tap in each yard — residents have more time to grow food and earn money to support their families.

Three years after an earthquake destroyed much of Haiti's capital, it's clear that only a fraction of the $9 billion pledged in international relief reached the country. Most of what did arrive went to short-term relief, instead of rebuilding people's homes.